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Retirement Benefits (Tables)
 6 Months Ended
Jun. 30, 2020
Retirement Benefits [Abstract]  
Calculation of Net Periodic Benefit Costs
A portion of the net periodic benefit cost for all plans is capitalized within the Consolidated Balance Sheets. The following table presents the components of Exelon's net periodic benefit costs, prior to capitalization, for the three and six months ended June 30, 2020 and 2019.
 
Pension Benefits
Three Months Ended June 30,
 
OPEB
Three Months Ended June 30,
 
2020
 
2019
 
2020
 
2019
Components of net periodic benefit cost:
 
 
 
 
 
 
 
Service cost
$
96

 
$
89

 
$
22

 
$
24

Interest cost
190

 
221

 
39

 
47

Expected return on assets
(318
)
 
(306
)
 
(40
)
 
(38
)
Amortization of:
 
 
 
 
 
 
 
Prior service cost (benefit)
1

 
—

 
(31
)
 
(44
)
Actuarial loss
128

 
103

 
12

 
10

Settlement charges
6

 
—

 
—

 
—

Net periodic benefit cost
$
103

 
$
107

 
$
2

 
$
(1
)


Pension Benefits
Six Months Ended June 30,
 
OPEB
Six Months Ended June 30,
 
2020
 
2019
 
2020
 
2019
Components of net periodic benefit cost:


 


 


 


Service cost
$
193

 
$
178

 
$
45

 
$
47

Interest cost
379

 
442

 
77

 
94

Expected return on assets
(636
)
 
(612
)
 
(81
)
 
(77
)
Amortization of:
 
 
 
 
 
 
 
Prior service cost (benefit)
2

 
—

 
(62
)
 
(89
)
Actuarial loss
256

 
206

 
24

 
23

Settlement charges
6

 
—

 
—

 
—

Net periodic benefit cost
$
200


$
214


$
3


$
(2
)
Allocated Portion of Pension and Postretirement Benefit Costs
The amounts below represent the Registrants' allocated pension and OPEB plan costs. For Exelon, the service cost component is included in Operating and maintenance expense and Property, plant and equipment, net while the non-service cost components are included in Other, net and Regulatory assets. For Generation and the Utility Registrants, the service cost and non-service cost components are included in Operating and maintenance expense and Property, plant and equipment, net in their consolidated financial statements.
 
 
Three Months Ended June 30,
 
Six Months Ended June 30,
Pension and OPEB Costs
 
2020
 
2019
 
2020
 
2019
Exelon
 
$
105

 
$
106

 
$
203

 
$
212

Generation
 
32

 
31

 
59

 
62

ComEd
 
28

 
23

 
57

 
47

PECO
 
1

 
3

 
3

 
5

BGE
 
16

 
16

 
31

 
30

PHI
 
18

 
24

 
35

 
48

Pepco
 
4

 
6

 
7

 
12

DPL
 
2

 
4

 
4

 
8

ACE
 
3

 
4

 
7

 
8
Defined Contribution Savings Plans
The Registrants participate in various 401(k) defined contribution savings plans that are sponsored by Exelon. The plans are qualified under applicable sections of the IRC and allow employees to contribute a portion of their pre-tax and/or after-tax income in accordance with specified guidelines. All Registrants match a percentage of the employee contributions up to certain limits. The following table presents the matching contributions to the savings plans during the three and six months ended June 30, 2020 and 2019, respectively.
 
 
Three Months Ended June 30,
 
Six Months Ended June 30,
Savings Plan Matching Contributions
 
2020
 
2019
 
2020
 
2019
Exelon
 
$
34

 
$
33


$
67


$
64

Generation
 
14

 
14

 
27

 
28

ComEd
 
9

 
9

 
16

 
16

PECO
 
2

 
2

 
5

 
5

BGE
 
2

 
2

 
4

 
4

PHI
 
3

 
3

 
6

 
6

Pepco
 
1

 
1

 
2

 
2

DPL
 
—

 
1

 
1

 
1

ACE
 
1

 
—

 
1

 
1